<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			*{
				margin:0;
				padding:0
			}
			.l{
				width:235px;
				height:138px;
				position:absolute;
				top:0px;
				left:0px;
				background: rgba(0,0,0,0.5);
			}
		</style>
	</head>
	<body>
		<div class="b">
			<img src="http://s2.cdn.xiachufang.com/5c6c004e89fe11e6a9a10242ac110002_1800w_1010h.jpg?imageView2/1/w/235/h/138/interlace/1/q/90" alt="" />
			<div class="l">
				
			</div>
		</div>
	</body>
</html>
